Integration of QAMs into
the CCAP Solution
July 2011
Asaf Matatyaou
Director, Cable Edge & Access Solutions
The targeted timeframes, products, features and/or functionality described herein are estimates only, shall not be relied on, may be changed at any time at Harmonic's sole discretion, and shall not be interpreted
as an obligation or deliverable for current or future orders, and shall not be incorporated into any contract. Obligations and deliverables are defined on an independent basis pursuant to the individual contract
terms and will default to current performance capabilities. Nothing herein shall create or impose any obligation on the part of Harmonic.
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EdgeQAM Introduction
EdgeQAM Overview in CCAP
Delivering Video Services Today
Migrating to Downstream-Only CCAP Services
Providing Full CCAP Services
EdgeQAM Introduction
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Video EdgeQAM
One or more ingress interfaces (typically GbE)
Accepting MPTS or SPTS inputs via UDP/IP from SDV, VOD or Linear IP
Broadcast sources
Multiplexes input programs into an MPTS that is modulated and transmitted
Multiple RF QAM egress interfaces
Universal EdgeQAM
Video EdgeQAM plus the capability to deliver DOCSIS data in an M-CMTS
architecture
Must be paired with an M-CMTS core and DOCSIS Timing Server (DTI)
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A STB client can
request video
streams from the SM,
which acquires the
necessary resources
for delivery
Manages
input/output
EQAM
resources
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CCAP – EdgeQAM Overview
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Supported protocols
− Linear broadcast
−SDV
− VOD
− DOCSIS for IPTV
Individual QAM channels could be reserved for one of these
services or a single narrowcast QAM channel may support
multiple protocols
Functioning as a Universal Edge QAM in an M-CMTS
configuration
Adhere to the NGOD requirements
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Some performance and capacity requirements are spelled
out
Performance specifications examples
− Session setup time to provision any stream MUST be less than
0.5 seconds
− SDV: 40 service groups MUST support minimum sustained rate
of 480 session changes per second
−VOD: Minimum rate of 40 sessions per hour per narrowcast
QAM channel
Capacity specifications examples
−Linear broadcast: minimum of 20 programs (MPTS or SPTS)
into a single MPTS
−MPEG: Minimum of 127 MPEG programs on any individual QAM,
with typical being 10 – 15 MPEG programs
−MPEG: Minimum of 8 PIDs per program; 256 PIDs per QAM
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Density (HW support)
−Minimum of 64 narrowcast QAMs per RF port, licensable from 32
QAMs, in steps of 16 QAMs, to a max supportable by specific
hardware
−Minimum of 96 broadcast QAMs, licensable from 16 QAMs, in steps of
16 QAMs, to a max of 96 broadcast QAMs
−Minimum of 2.5 RF service groups per RU (e.g. 40 SGs for 16 RU)
QAM Replication
−Create service groups on a decoupled, service-by-service basis
−Handle service group inequalities by sharing a set of SDV or VOD
QAMs to form service groups with unique sets of HSD QAMs
−Replicate narrowcast video (SDV and VOD) QAMs across multiple
ports on a given line card
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Combining
Spliting
Data
SG1
Data
SG1
Data
SGn
8-Way
N’cast
8-Way
N’cast
Video
SG1
Video
SG1
NODE 32
8WAY
NODE 33
VOD
QAMs
8WAY
NODE 34
SDVevery
Typically
QAMs
Service group has
a dedicated set of
combiner /
splitter
8-Way
N’cast
8-Way
N’cast
Video
SGm
Video
SGm
8WAY
NODE 35
Broadcast Digital and
Analog
Data SG2
Data
SGn
8WAY
Data SGn-1
Data
SGn-1
DOCSIS
DownStreams
Data SGn
Data
SGn-1
Video SG1
Data
SG2
NODE 31
Video SGm
Data
SG2
8WAY
Data SG1
OOB
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Broadcast Digital and
Analog
NODE 32
8WAY
NODE 33
8WAY
NODE 34
8WAY
NODE 35
Data SG2
8WAY
Data SGn-1
`
Advantages:
· Minimal combining
· Lower cost per QAM
· Less QAM RF ports
· Easy to manage
NODE 31
Data SGn
DOCSIS &
VOD &
SDV
QAMs
8WAY
Video SG1
How Does it work:
· Each RF port feeds one optical transmitter
· Service Groups Mapping is managed by
the EdgeQAM (Instead of actual wiring)
· Duplicating QAMs to multiple ports
according to the Data and Video service
groups Mapping
Data SG1
OOB
Video SGm
Spliting
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CCAP
MHA
CCAP and MHA are based on the identical
Video Headend Reference Architecture
Path to CCAP
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Today’s capacity needs and near-term growth are met with
existing Dense EdgeQAM platforms
−For example: 324 QAMs/RU; 9 ports/RU
As capacity grows beyond existing EdgeQAM or CMTS
capabilities, migrate to Downstream-Only CCAP chassis
Downstream-Only CCAP chassis is HW-capable of achieving
full CCAP functionality, enabling convergence of video and
data in a single platform
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Operation Focus
− Modular Design, Hot swappable components
− Reliability, system performance over time
− SW suite for day-2-day operation
− Universal EQAM platform for VOD, SDV, M-CMTS, Broadcast
CCAP Feature Support
− Highest density, Lowest power per QAM
− Frequency Agility, Flexible placement of individual QAMs
− Flexible price, Pay as you grow
− Most cost-effective solution
Advanced software
− Rich feature set & Intuitive configuration
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Services:
−SDV
−VOD
−CMTS
−Cable-IPTV
−Linear Broadcast
Eco-systems:
−NGOD
−ISA
−Proprietary
Encryption:
– PM
– DVB CAS
– Session base
– Tier base
– Pre- encryption
Variable Equalizer
Virtual Combining
Radius
CCAP’s EdgeQAM requirements are
heavily based on these technologies
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Today’s Dense EdgeQAM addresses key CCAP features
−Video QAM growth
−M-CMTS growth
−Extensive feature set
What doesn’t it provide
−A platform to add future upstream services
−High availability (N+1 LCs)
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New packaging of existing platforms
Chassis meets CCAP High Availability/Redundancy requirements
Designed for low cost and higher capacity of QAMs
Integrating existing EdgeQAM and M-CMTS functionality into
CCAP-capable platform
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Application delivery of SDV, VOD, M-CMTS, Cable IPTV and
Broadcast services
Leverages the identical Video Headend Reference
Architecture utilized in both today’s EdgeQAM products
and the CCAP specifications
Enables EdgeQAM and M-CMTS service growth beyond
existing capacity at platform introduction
Capable of complete data and video service convergence
as Upstream Line-Card and DOCSIS applications are added
Leverages: EdgeQAM platform’s extensive applications and features
Provides: chassis-based CCAP-capable EdgeQAM & M-CMTS services
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Leverages low-cost, high-density chassis
− Single chassis with converged applications saves rack space
Any service (data or video) on any QAM
− Hedge against traditional video growth versus Video over IP growth
Service Group growth flexibility
− Internal replication of SGs allows for different sized HSD and VOD/SDV SGs
A single platform that allows for DS and US port growth
specific to an operator’s needs
− Fill a chassis entirely with Downstream Line-Cards
− Add Upstream Line-Cards as needed, proportional to data service needs
− Continues with the “pay-as-you-grow” model
Leverages: chassis-based CCAP-capable EdgeQAM & M-CMTS services
Provides: Upstream Line-Card and DOCSIS applications
Shipping:
-40 Gig 2 RU
-Fast-DAC / Dense-QAM
-VOD/SDV/M-CMTS/IPTV &
Broadcast deployments
9000-40G
New Packaging
NSG HA DS-Only
CCAP-Capable
CCAP
Shipping
In Development
Roadmap
The targeted timeframes, products, features and/or functionality described herein are estimates only, shall not be relied on, may be changed at any time at Harmonic's sole discretion, and shall not be interpreted
as an obligation or deliverable for current or future orders, and shall not be incorporated into any contract. Obligations and deliverables are defined on an independent basis pursuant to the individual contract
terms and will default to current performance capabilities. Nothing herein shall create or impose any obligation on the part of Harmonic.
CCAP
Deployment Scenerios
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Convergence of data and video into a low-cost, small
device
Flexibility in deployment, by matching multiple Access
Shelves with a single Edge Router
− Possibly at a centralized Headend
− Fits perfectly into a distributed architecture, locating Access
Shelves at hubs and OTNs which are fed from a centralized
Headend
Dramatic reduction in rack space and power consumption
Application: OTN / Hub consolidation
Before
After
Summary
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Today: Grow QAM capacity for immediate service growth
− Use today’s dense EdgeQAM platforms
− VOD, SDV, M-CMTS, IPTV and Broadcast deployments
− Highly dense solution (both QAM/RU and port/RU)
− Rich SW solution
− Proven high reliability
Next: Extend QAM Capacity in a HA, chassis-based, full-CCAP-capable
platform
− Low cost, small size
− Repackaging of existing CCAP-ready features with the roadmap for tomorrow
Finally: Introduce data-based services in a single platform
− Low-cost data and video QAMs
− Incremental DOCSIS-based applications
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